Airplane seat



FIG. 1 is a front view showing my design thereof;

FIG. 2 is a back view;

FIG. 3 is a side view;

FIG. 4 is a side view; and,

FIG. 5 is a top view.

The broken lines, shown in the drawing, are included for the purpose of illustrating environmental structure and form no part of the claimed design. 

CLAIM The ornamental design for airplane seat, as shown and described. 